CN108150315A - EGR exhaust processing unit and automobile - Google Patents
EGR exhaust processing unit and automobile Download PDFInfo
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- CN108150315A CN108150315A CN201711480694.3A CN201711480694A CN108150315A CN 108150315 A CN108150315 A CN 108150315A CN 201711480694 A CN201711480694 A CN 201711480694A CN 108150315 A CN108150315 A CN 108150315A
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- egr
- control valve
- exhaust
- engine
- exhaust gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/22—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1409—Introducing closed-loop corrections characterised by the control or regulation method using at least a proportional, integral or derivative controller
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M2026/001—Arrangements; Control features; Details
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a kind of EGR exhaust processing units, including the first exhaust gas discharge header, first exhaust gas exhaust outlet, first waste gas recovery branch pipe, first EGR control valve, control valve and turbocharger before first whirlpool, first exhaust gas discharge header inlet end is connect with engine outlet side, outlet side of the inlet end of the inlet end of first exhaust gas exhaust outlet and the first waste gas recovery branch pipe with the first exhaust gas discharge header is connect, the outlet side of first exhaust gas exhaust outlet is connect with turbocharger, the outlet side of first waste gas recovery branch pipe and the inlet end of engine connect, first EGR control valve is mounted on the first waste gas recovery branch pipe, control valve is mounted on the first exhaust gas exhaust outlet before first whirlpool.The invention also discloses a kind of automobiles for including above-mentioned EGR exhaust processing unit.
Description
Technical field
The present invention relates to engine exhaust recirculating technique field, more particularly to a kind of EGR exhaust processing unit.The present invention
Further relate to a kind of automobile including setting EGR exhaust processing unit.
Background technology
In recent years, the exhaust pollution of automobile and CO2Ball ecological environment caused by discharge destroys and greenhouse effects problem day
It is beneficial serious.Climate warming that the low automobile of the good fuel consumption rate of blowdown can not only alleviate global greenhouse effect and bring, ecological ring
The influence that border balance is destroyed.In order to reduce environmental pollution, EGR (Exhaust Gas Recirculation, exhaust gas recycling) is
The exhaust gas that engine is discharged is reintroduced back to after air inlet pipe and live gas mixing and is burnt into combustion chamber, this measure can be effective
Engine DS NOx Est is reduced to be widely used.
Traditional EGR exhaust processing unit includes exhaust gas discharge header, exhaust gas exhaust outlet, waste gas recovery branch pipe, EGR controls
Valve processed, turbocharger and the engine controller for controlling EGR control apertures, wherein, exhaust gas discharge header inlet end with
Engine outlet side connects, and the inlet end of exhaust gas exhaust outlet and waste gas recovery branch pipe connects with the outlet side of exhaust gas discharge header
It connects, the outlet side of exhaust gas exhaust outlet is connect with turbocharger, the outlet side of waste gas recovery branch pipe and the inlet end of engine
Connection, EGR control valve are mounted on waste gas recovery branch pipe.
However, due to being equipped with EGR control valve only on waste gas recovery branch pipe, the pressure before whirlpool, nothing can not be effectively adjusted
Method accurately adjusts EGR driving pressure differences so that EGR rate is relatively low.
Therefore, how EGR rate is improved, is the technical issues of those skilled in the art are urgently to be resolved hurrily.
Invention content
The object of the present invention is to provide a kind of EGR exhaust processing unit, to improve EGR rate.It is another object of the present invention to
A kind of automobile for including above-mentioned EGR exhaust processing unit is provided.
To achieve the above object, the present invention provides a kind of EGR exhaust processing unit, including the first exhaust gas discharge header, the
Control valve and turbocharger before one exhaust gas exhaust outlet, the first waste gas recovery branch pipe, the first EGR control valve, the first whirlpool, it is described
First exhaust gas discharge header inlet end is connect with engine outlet side, the inlet end of the first exhaust gas exhaust outlet and described
Outlet side of the inlet end of one waste gas recovery branch pipe with the first exhaust gas discharge header is connect, the first exhaust gas discharge branch
The outlet side of pipe is connect with the turbocharger, and the outlet side of the first waste gas recovery branch pipe and the inlet end of engine connect
It connects, first EGR control valve is mounted on the first waste gas recovery branch pipe, and control valve is mounted on described before first whirlpool
On first exhaust gas exhaust outlet.
Preferably, the first cooler for recycled exhaust gas is further included, first cooler for recycled exhaust gas is arranged on the first waste gas recovery branch
Guan Shang, and it is located at along air motion direction the front of first EGR control valve.
Preferably, the second exhaust gas discharge header, the second exhaust gas exhaust outlet, the second waste gas recovery branch pipe, second are further included
Control valve before EGR control valve and the second whirlpool, the second exhaust gas discharge header inlet end are connect with engine outlet side, and described
The inlet end of the inlet end of two exhaust gas exhaust outlets and the second waste gas recovery branch pipe with the second exhaust gas discharge header
Outlet side connection, the outlet side of the second exhaust gas exhaust outlet connect with the turbocharger, second exhaust gas time
The outlet side of revenue and expenditure pipe and the inlet end of engine connect, and second EGR control valve is mounted on the second waste gas recovery branch
Guan Shang, control valve is mounted on the second exhaust gas exhaust outlet before second whirlpool.
Preferably, the second cooler for recycled exhaust gas is further included, second cooler for recycled exhaust gas is arranged on the second waste gas recovery branch
Guan Shang, and it is located at along air motion direction the front of second EGR control valve.
Preferably, it further includes:
Intake-air throttle valve, mounted on engine intake；
Pressure sensor before whirlpool for measuring pressure before whirlpool, obtains pressure measuring value before whirlpool；
Air inlet pressure sensor for measuring engine charge pressure, obtains engine charge pressure measured value；
Engine controller, the engine controller are used for according to pressure target before the whirlpool under engine current working
Value adjusts the aperture of control valve before control valve and second whirlpool before first whirlpool, until before the whirlpool pressure measuring value with
Pressure target value is identical and according to the engine charge pressure desired value under engine current working before whirlpool under current working,
The air inlet restriction valve opening is adjusted, until the engine charge pressure desired value under current working is surveyed with engine charge pressure
Magnitude is identical
Preferably, the control of first EGR control valve and the second EGR control valve aperture includes engine controller
The waste gas stream magnitude of EGR exhaust flow and total air inlet magnitude of air inlet cylinder are obtained, obtains EGR rate actual value, it is described to start
Machine controller adjusts first EGR control valve by PID closed-loop controls or system control model and the 2nd EGR is controlled
The aperture of valve so that EGR rate actual value is identical with the engine EGR rate desired value under current working.
Preferably, the control of first EGR control valve and the second EGR control valve aperture includes engine controller
Tailpipe or the oxygen concentration of inlet manifold are obtained, total charge flow rate of air inlet cylinder is calculated according to model, and according to mistake
The amount of fuel of journey consumption, is calculated the oxygen concentration actual value of inlet manifold, and the engine controller passes through PID closed-loop controls
Or system control model adjusts first EGR control valve and the second EGR control valve aperture, the oxygen concentration of inlet manifold
Actual value is identical with the oxygen concentration desired value of the motor intake manifold under current working.
Preferably, FAI Fresh Air Intake pipe and the gas flow being arranged on FAI Fresh Air Intake pipe sensing are further included
Device, the gas flow sensor are connect with the engine controller, first EGR control valve and the 2nd EGR controls
Valve opening control processed includes engine controller and obtains the new charge flow before EGR mixing, and the engine controller passes through
PID closed-loop controls or system control model adjust first EGR control valve and the second EGR control valve aperture so that
New charge flow actual value is identical with the engine new charge flow target value under current working.
A kind of automobile, the EGR exhaust processing unit being connect including engine and with the engine, wherein, the EGR rows
Flash Gas Compression Skid System is EGR exhaust processing unit described in any one of the above embodiments.
In the above-mentioned technical solutions, EGR exhaust processing unit provided by the invention includes the first exhaust gas discharge header, first
Control valve and turbocharger before exhaust gas exhaust outlet, the first waste gas recovery branch pipe, the first EGR control valve, the first whirlpool, first is useless
Gas discharge header inlet end is connect with engine outlet side, the inlet end of the first exhaust gas exhaust outlet and the first waste gas recovery branch pipe
Outlet side of the inlet end with the first exhaust gas discharge header connect, the outlet side of the first exhaust gas exhaust outlet and turbocharger
Connection, the outlet side of the first waste gas recovery branch pipe and the inlet end of engine connect, and the first EGR control valve is mounted on the first exhaust gas
It recycles on branch pipe, control valve is mounted on the first exhaust gas exhaust outlet before the first whirlpool.
By foregoing description it is found that in the EGR exhaust processing unit provided in the application, obtaining high EGR rate needs to lead to
It crosses pressure before raising whirlpool or reduces admission pressure, obtain high driving pressure difference, it, can be by changing whirlpool in the technical program
The throttle valve area before turbocharger is taken turns, improves the pressure before whirlpool, and then obtain required EGR rate desired value.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
The installation site figure for the EGR exhaust processing unit that Fig. 1 is provided by the embodiment of the present invention.
In wherein Fig. 1：1- engines, the first exhaust gas of 2- discharge header, the first waste gas recoveries of 3- branch pipe, the first exhaust gas of 4- row
Go out control valve, the second exhaust gas of 7- discharge header, 8- the second waste gas recovery branch before branch pipe, the first EGR control valves of 5-, the first whirlpools of 6-
Control valve, the first cooler for recycled exhaust gas of 12-, 13- before pipe, the second exhaust gas of 9- exhaust outlet, the second EGR control valves of 10-, the second whirlpools of 11-
Second cooler for recycled exhaust gas, 14- intake-air throttle valves, 15- air filters, 16- turbocharger, 17- after-treatment devices, 18- charge air coolers,
19- mixing ducts.
Specific embodiment
The core of the present invention is to provide a kind of EGR exhaust processing unit, to improve EGR rate.The present invention another core be
A kind of automobile for including above-mentioned EGR exhaust processing unit is provided.
In order to which those skilled in the art is made to more fully understand technical scheme of the present invention, below in conjunction with the accompanying drawings and embodiment party
The present invention is described in further detail for formula.
It please refers to Fig.1, in a kind of specific embodiment, the EGR exhaust processing unit of specific embodiment of the invention offer
Including the first exhaust gas discharge header 2, the first exhaust gas exhaust outlet 4, the first waste gas recovery branch pipe 3, the first EGR control valve 5, first
Control valve 6, turbocharger 16 before whirlpool, 2 inlet end of the first exhaust gas discharge header are connect with 1 outlet side of engine, the first exhaust gas
The inlet end of the inlet end of exhaust outlet 4 and the first waste gas recovery branch pipe 3 connects with the outlet side of the first exhaust gas discharge header 2
It connects, the outlet side of the first exhaust gas exhaust outlet 4 is connect with turbocharger 16, the outlet side of the first waste gas recovery branch pipe 3 and hair
The inlet end connection of motivation 1, the first EGR control valve 5 are mounted on the first waste gas recovery branch pipe 3, and control valve 6 is installed before the first whirlpool
On the first exhaust gas exhaust outlet 4.
By foregoing description it is found that in the EGR exhaust processing unit provided in the application specific embodiment, obtain high
EGR rate needs by improving pressure before whirlpool or reduce admission pressure, to obtain high driving pressure difference, can in the technical program
By changing the throttle valve area before turbine turbocharger 16, to improve the pressure before whirlpool, and then the EGR rate mesh needed for obtaining
Scale value.
In order to extend the service life of EGR exhaust processing unit, it is preferable that the EGR exhaust processing unit further includes the first EGR
Cooler 12, the first cooler for recycled exhaust gas 12 are arranged on the first waste gas recovery branch pipe 3, and are located at the first EGR along air motion direction
The front of control valve 5.
Further, which further includes the second exhaust gas discharge header 7, the second exhaust gas exhaust outlet 9,
Control valve 11 before two waste gas recovery branch pipes 8, the second EGR control valve 10 and the second whirlpool, 7 inlet end of the second exhaust gas discharge header and hair
1 outlet side of motivation connects, and the inlet end of the second exhaust gas exhaust outlet 9 and the second waste gas recovery branch pipe 8 is discharged with the second exhaust gas
The outlet side connection of manifold 7, the outlet side of the second exhaust gas exhaust outlet 9 are connect with turbocharger 16, the second waste gas recovery branch
The outlet side of pipe 8 is connect with the inlet end of engine 1, and the second EGR control valve 10 is mounted on the second waste gas recovery branch pipe 8, the
Control valve 11 is mounted on the second exhaust gas exhaust outlet 9 before two whirlpools.It is preferred that FAI Fresh Air Intake pipe is further included, wherein fresh sky
After gas air inlet pipe is evolved by air filter, FAI Fresh Air Intake pipe, wherein FAI Fresh Air Intake are entered by turbocharger 16
The outlet side of pipe, 3 outlet side of the first waste gas recovery branch pipe and 8 outlet side of the second waste gas recovery branch pipe pass through mixing duct 19 and hair
The air inlet connection of motivation 1.
Wherein, control valve 11 before control valve 6, the second EGR control valve 10 and the second whirlpool before the first EGR control valve 5, the first whirlpool
Opening and closing can be controlled manually, in order to improve accuracy, reduce labor intensity, it is preferable that engine controller is further included, wherein starting
Control valve 11 before control valve 6, the second EGR control valve 10 and the second whirlpool before the first EGR control valve 5 of machine controller control, the first whirlpool
Aperture.
In order to extend the service life of EGR exhaust processing unit, it is preferable that the EGR exhaust processing unit further includes the 2nd EGR
Cooler 13, the second cooler for recycled exhaust gas 13 are arranged on the second waste gas recovery branch pipe 8, and are located at the 2nd EGR along air motion direction
The front of control valve 10.
For the ease of application valve body, it is preferable that control valve 6 is identical with the aperture of control valve 11 before the second whirlpool before the first whirlpool, the
One EGR control valve 5 is identical with the aperture of the second EGR control valve 10, and the exhaust of the engine controller controls engine 1 enters hair
Control valve 11 passes through driving machine before 6 and second whirlpool of control valve before the flow velocity of motivation 1, realization both sides while symmetrical control i.e. the first whirlpool
Structure controls simultaneously, and wherein the driving device specifically can be by forms such as pneumatic, hydraulic pressure, motor drivings, and sectional area is when arbitrary
Quarter is all identical, and pressure both sides are identical before whirlpool；Also the asymmetrical control of bilateral can be realized, 6 He of control valve before the first whirlpool
Control valve 11 can individually control aperture by driving mechanism before second whirlpool, and in synchronization, the exhaust tube section of both sides is different,
Pressure both sides differ before whirlpool.
Specifically, when engine 1 is braked, before the first whirlpool of reduction 11 section of control valve before 6 and second whirlpool of control valve
Product improves pressure at expulsion, realizes braking function.
In SCR (Diesel Particulate Filter, diesel particulate filter) heating modes and DPF
During (Selective Catalytic Reduction, selective catalytic reduction) regeneration mode, it needs to meet certain exhaust
Temperature realizes exhaust heat management function by the orifice size of control valve 11 before 6 and second whirlpool of control valve before the first whirlpool of control.
Control valve 11 can adjust the pressure before whirlpool before 6 and second whirlpool of control valve before first whirlpool, and then realize EGR drivings
Pressure difference realizes the promotion of EGR rate.
Twin-channel egr system of the formation of the application, the EGR flow control the arbitrary control that can realize two wing passages
System can both realize identical aperture control, can also asymmetrical control both sides aperture.
When control valve 11 completely closes before 6 and second whirlpool of control valve before by the first whirlpool, theory can be achieved on maximum
50% high EGR rate is horizontal.
Pass through 11 and first EGR control valve 5 of control valve and the 2nd EGR controls before 6 and second whirlpool of control valve before the first whirlpool of control
10 aperture of valve processed realizes the assignment of traffic of the exhaust gas and EGR exhaust into turbine, realizes emission control and oil consumption control.
In the technical solution, turbocharger 16 is matched according to system requirements, 16 turbine end of turbocharger into
Mouth is the scheme of dual channel.Simultaneously preferably to realize the function, two runners of engine 1 can be asymmetric form,
Preferably realize the efficiency of turbocharger 16.
Further, it is adjusted to realize that valve body control is accurate, it is preferable that the EGR exhaust processing unit further includes:
Intake-air throttle valve 14, mounted on 1 air inlet of engine；
Pressure sensor before whirlpool for measuring pressure before whirlpool, obtains pressure measuring value before whirlpool；
Air inlet pressure sensor for measuring 1 admission pressure of engine, obtains 1 admission pressure measured value of engine；
Engine controller is used to, according to pressure target value before the whirlpool under 1 current working of engine, control before adjusting the first whirlpool
The aperture of control valve 11 before 6 and second whirlpool of valve processed, until pressure measuring value and pressure target value before the whirlpool under current working before whirlpool
It is identical.Specifically, engine controller is adjusted according to the engine charge pressure desired value under engine current working into moral
Valve opening is flowed, until the engine charge pressure desired value under current working is identical with engine charge pressure measured value.Specifically
, engine controller can be by controlling before 6 and second whirlpool of control valve before 14 or first whirlpool of PID approach adjusting intake-air throttle valve
The aperture of valve 11.
Engine controller adjusts air inlet according to the 1 admission pressure desired value of engine under 1 current working of engine simultaneously
14 aperture of throttle valve, until 1 admission pressure desired value of engine and 1 admission pressure measured value phase of engine under current working
Together.
By Bench calibration, engine 1 best EGR rate setting value or best air inlet under current working are obtained
Manifold oxygen concentration, again or best new charge flow, specific control form are as follows：
In the first embodiment, using EGR rate as control targe, the first EGR control valve 5 and the 2nd EGR controls
The control of 10 aperture of valve includes total air inlet that engine controller obtains the waste gas stream magnitude and air inlet cylinder of EGR exhaust flow
Magnitude, obtains EGR rate actual value, and engine controller controls the first EGR to control by PID closed-loop controls or system control model
The aperture of 5 and second EGR control valve 10 of valve processed so that EGR rate actual value and the engine 1EGR rate desired values under current working
It is identical.Specifically can practical EGR exhaust flow be measured by exhaust gas venturi and pass through model that air inlet cylinder is calculated is total
Air inflow.
In the second embodiment, using best inlet manifold oxygen concentration as control targe, the first EGR control valve
5 and the control of 10 aperture of the second EGR control valve include the oxygen concentration that engine controller obtains tailpipe or inlet manifold,
Total charge flow rate of air inlet cylinder, and the amount of fuel consumed according to process are calculated according to model, inlet manifold is calculated
Oxygen concentration actual value, engine controller adjust 5 He of the first EGR control valve by PID closed-loop controls or system control model
Second EGR control valve, 10 aperture so that the oxygen concentration actual value of inlet manifold and the motor intake manifold under current working
Oxygen concentration desired value is identical.
In the third embodiment, using best new charge flow as control targe, EGR exhaust processing unit
The gas flow sensor for further including FAI Fresh Air Intake pipe and being arranged on FAI Fresh Air Intake pipe, gas flow sensor with
Engine controller connects, and the first EGR control valve 5 and the control of 10 aperture of the second EGR control valve include engine controller acquisition
New charge flow before EGR mixing, engine controller is adjusted adjusts the by PID closed-loop controls or system control model
10 aperture of one EGR control valve 5 and the second EGR control valve so that new charge flow actual value and the engine under current working
New charge flow target value is identical, and wherein fresh air refers to directly pump to the gas in engine 1 from the external world.
In order to improve power, it is preferable that the EGR exhaust processing unit further includes the butterfly for being arranged on 1 air inlet of engine
Valve.Since braking process can be reached by improving pressure at expulsion, traditional mode is to export to increase butterfly by engine 1
Valve is realized by changing the area of butterfly valve.The shortcomings that this mode is that exhaust gas does work by engine 1, affects braking
Effect.Butterfly valve mounted in 1 entrance of engine, can be realized higher power, this mode can also coordinate cylinder internal pressure by the application
Contracting release braking model or the exhaust valve braking model etc. that loses heart are used together, according to different braking power demands.
Under some special operation conditions, when needing high EGR rate, for example it is unable to reach enough than relatively low SCR in whirlpool heel row temperature
The process of transformation efficiency, and monitoring NOx is needed to discharge, it needs preferentially to ensure discharge at this time.For this process, can pass through
The independent control of unilateral exhaust system obtains the EGR rate of highest 50%.For example, keep 6 standard-sized sheet of control valve and first before the first whirlpool
EGR control valve 5 is fully closed, and the exhaust of this side is made to fully enter turbocharger 16.The second EGR control valve 10 is opened, and is closed
Control valve 11 before second whirlpool, the exhaust of this side at this time does not enter back into turbocharger 16, but is all re-circulated into air inlet
Mixing, can realize higher EGR rate at this time.
For this process, for practical application angle, the operating mode of appearance be not it is very much, can be according to engine 1
Operational mode, the course of work of valve before opened loop control EGR valve and whirlpool demarcates the MAP of the valve opening based on operating mode
(Manifold Absolute Pressure Intake Manifold Absolute Pressure Sensor) is realized.
In braking process, 10 Close All of engine controller controls the first EGR control valve 5 and the second EGR control valve.The
Before one whirlpool before 6 and second whirlpool of control valve 11 aperture of control valve by the opening value corresponding to the braking power demand actually demarcated after
It is continuous to be adjusted.Control valve before 6 and second whirlpool of control valve before the first whirlpool of the progress of the opening value corresponding to pressure before whirlpool can be passed through
11 aperture regulations, can also be using control valve 11 before 6 and second whirlpool of control valve before corresponding the first whirlpool of aperture progress of rotating speed calibration
Aperture regulation.
A kind of automobile that the application provides includes engine 1 and the EGR exhaust processing unit being connect with engine 1, EGR rows
Flash Gas Compression Skid System is any of the above-described kind of EGR exhaust processing unit.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide range caused.
Claims (9)
1. a kind of EGR exhaust processing unit, which is characterized in that including the first exhaust gas discharge header (2), the first exhaust gas exhaust outlet
(4), control valve (6) and turbocharger (16), institute before the first waste gas recovery branch pipe (3), the first EGR control valve (5), the first whirlpool
It states the first exhaust gas discharge header (2) inlet end to connect with engine outlet side, the inlet end of the first exhaust gas exhaust outlet (4)
It is connect with outlet side of the inlet end of the first waste gas recovery branch pipe (3) with the first exhaust gas discharge header (2), it is described
The outlet side of first exhaust gas exhaust outlet (4) is connect with the turbocharger (16), the first waste gas recovery branch pipe (3)
The inlet end of outlet side and engine connects, and first EGR control valve (5) is mounted on the first waste gas recovery branch pipe (3)
On, control valve (6) is on the first exhaust gas exhaust outlet (4) before first whirlpool.
2. EGR exhaust processing unit according to claim 1, which is characterized in that the first cooler for recycled exhaust gas (12) is further included,
First cooler for recycled exhaust gas (12) is arranged on the first waste gas recovery branch pipe (3), and along air motion direction positioned at described
The front of first EGR control valve (5).
3. EGR exhaust processing unit according to claim 2, which is characterized in that further include the second exhaust gas discharge header
(7), control valve before the second exhaust gas exhaust outlet (9), the second waste gas recovery branch pipe (8), the second EGR control valve (10) and the second whirlpool
(11), the second exhaust gas discharge header (7) inlet end is connect with engine outlet side, the second exhaust gas exhaust outlet (9)
Inlet end and the second waste gas recovery branch pipe (8) outlet side of the inlet end with the second exhaust gas discharge header (7)
Connection, the outlet side of the second exhaust gas exhaust outlet (9) are connect with the turbocharger (16), second waste gas recovery
The outlet side of branch pipe (8) and the inlet end of engine connect, and second EGR control valve (10) is returned mounted on second exhaust gas
On revenue and expenditure pipe (8), control valve (11) is on the second exhaust gas exhaust outlet (9) before second whirlpool.
4. EGR exhaust processing unit according to claim 3, which is characterized in that the second cooler for recycled exhaust gas (13) is further included,
Second cooler for recycled exhaust gas (13) is arranged on the second waste gas recovery branch pipe (8), and along air motion direction positioned at described
The front of second EGR control valve (10).
5. EGR exhaust processing unit according to claim 3, which is characterized in that further include:
Intake-air throttle valve (14), mounted on engine intake；
Pressure sensor before whirlpool for measuring pressure before whirlpool, obtains pressure measuring value before whirlpool；
Air inlet pressure sensor for measuring engine charge pressure, obtains engine charge pressure measured value；
Engine controller, the engine controller are used to, according to pressure target value before the whirlpool under engine current working, adjust
Before whole first whirlpool before control valve (6) and second whirlpool control valve (11) aperture, until pressure measuring value is with working as before whirlpool
Pressure target value is identical and according to the engine charge pressure desired value under engine current working before whirlpool under preceding operating mode, adjusts
The whole intake-air throttle valve (14) aperture, until engine charge pressure desired value and engine charge pressure under current working
Measured value is identical.
6. EGR exhaust processing unit according to claim 5, which is characterized in that first EGR control valve (5) and institute
State the second EGR control valve (10) aperture control include engine controller obtain EGR exhaust flow waste gas stream magnitude and into
Total air inlet magnitude of gas cylinder, obtains EGR rate actual value, and the engine controller passes through PID closed-loop controls or system
Controlling model adjusts the aperture of first EGR control valve (5) and second EGR control valve (10) so that EGR rate actual value
It is identical with the engine EGR rate desired value under current working.
7. EGR exhaust processing unit according to claim 5, which is characterized in that first EGR control valve (5) and institute
State the second EGR control valve (10) aperture control include engine controller obtain tailpipe or inlet manifold oxygen it is dense
Degree calculates total charge flow rate of air inlet cylinder, and the amount of fuel consumed according to process according to model, inlet manifold is calculated
Oxygen concentration actual value, the engine controller passes through PID closed-loop controls or system control model and adjusts the first EGR
Control valve (5) and second EGR control valve (10) aperture, the oxygen concentration actual value of inlet manifold and starting under current working
The oxygen concentration desired value of machine inlet manifold is identical.
8. EGR exhaust processing unit according to claim 5, which is characterized in that further include FAI Fresh Air Intake pipe and set
Put the gas flow sensor on the FAI Fresh Air Intake pipe, the gas flow sensor and the engine controller
Connection, first EGR control valve (5) and the control of second EGR control valve (10) aperture include engine controller acquisition
New charge flow before EGR mixing, the engine controller adjust institute by PID closed-loop controls or system control model
State the first EGR control valve (5) and second EGR control valve (10) aperture so that new charge flow actual value and current work
Engine new charge flow target value under condition is identical.
9. a kind of automobile, the EGR exhaust processing unit being connect including engine and with the engine, which is characterized in that described
EGR exhaust processing unit is the EGR exhaust processing unit described in any one of claim 1-8.
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| CN201711480694.3A CN108150315B (en) | 2017-12-29 | 2017-12-29 | EGR exhaust treatment device and automobile |
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| CN110529298A (en) * | 2019-07-29 | 2019-12-03 | 东风商用车有限公司 | A kind of double entrances integrate the controllable egr system of hot and cold EGR valve |
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| CN113267224A (en) * | 2021-05-12 | 2021-08-17 | 潍柴动力股份有限公司 | EGR mass flow measurement method and device and tail gas treatment system |
| CN116181504A (en) * | 2023-01-19 | 2023-05-30 | 江铃汽车股份有限公司 | Calibration control method and device for preventing failure of engine EGR (exhaust gas Recirculation) system |
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| CN116181504A (en) * | 2023-01-19 | 2023-05-30 | 江铃汽车股份有限公司 | Calibration control method and device for preventing failure of engine EGR (exhaust gas Recirculation) system |
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